Aiming at energy hole problem and energy-heterogeneous of nodes caused by hot spots problem in wireless sensor networks（ WSNs）

redeploy the network to meet requirements of area coverage. The area coverage optimization model for energy-heterogenous nodes is established

choose network coverage rate as objective function and positions of nodes to be the decision variable

use differential evolution algorithm to optimize the target

at the same time

get the optimal positions of nodes. Simulation experiments show that this model can fully schedule remaining energy of each node

prolong network lifetime and improve the reliability of WSNs.